Drago BASIC v2.2 by Cross-Soft - One of our kind visitors shared some details about this BASIC extension that's geared towards 3D graphics animation.  Version 2.0 of this software was published in a special issue of a Polish magazine called Bajtek sometime in 1987-88.  Version 2.2 appears to be nearly the same, and accepts the same commands as that published in the magazine.

Here's a link to the magazine article.  Thanks Al!